It's about as heavy as a Giraffe.
It's about nine-tenths as heavy as a Rhinoceros.
In other words, 29,800,000 grains is 0.920 times the weight of a Rhinoceros, and the weight of a Rhinoceros is 1.10 times that amount.(for Black rhinoceros, Diceros bicornis) (Adult, male)
An adult black rhinoceros weighs between 32,000,000 grains. Rhinoceros are extremely aggressive — nearly one of every two males will die as a result of fighting with other rhinoceros.
It's about one-and-one-fifth times as heavy as a Car.
In other words, 29,800,000 grains is 1.1690 times the weight of a Car, and the weight of a Car is 0.85540 times that amount.(for 2009 Ford Taurus; automatic transmission; curb weight)
A 2009 Ford Taurus weighs 25,490,000 grains. The first mass-produced car, the Curved Dash Oldsmobile — introduced in 1901 — weighed just 5,957,000 grains.
It's about seven-tenths as heavy as The Tongue of a Blue Whale.
In other words, 29,800,000 grains is 0.720 times the weight of The Tongue of a Blue Whale, and the weight of The Tongue of a Blue Whale is 1.40 times that amount.(Balaenoptera musculus) (adult)
The tongue of a Blue Whale can weigh up to 42,000,000 grains. Despite their tremendous size, blue whales feed almost exclusively on tiny crustaceans called krill and cannot swallow anything much larger than a beach ball.
It's about half as heavy as a Hippopotamus.
In other words, 29,800,000 grains is 0.5150 times the weight of a Hippopotamus, and the weight of a Hippopotamus is 1.940 times that amount.(Hippopotamus amphibius) (adult, male)
The average weight of an adult male hippopotamus ranges from 57,900,000 grains. Appearances to the contrary, adult hippos cannot swim or float in water; they actually move by leaping and walking across lake bottoms at about 8 kph (5 mph).
It's about three times as heavy as a Cow.
In other words, 29,800,000 grains is 2.80 times the weight of a Cow, and the weight of a Cow is 0.360 times that amount.(for Holstein, a.k.a. Holstein Friesian, a.k.a. Friesian, Bos primigenius) (adult, heifer)
A mature Holstein cow (the well-known black-and-white, spotted breed of cow) typically weighs 10,000,000 grains. President William Howard Taft (1909 - 1913) kept a Holstein cow named Pauline Wayne on the White House grounds — a gift from a Wisconsin senator and the source of the First Family's milk.
It's about one-third as heavy as an Elephant.
In other words, the weight of an Elephant is 3.10 times 29,800,000 grains.(for African bush elephant, Loxodonta africana) (Adult, bull)
A bull African bush elephant weighs about 94,000,000 grains. Among African elephants, both males and females have tusks (whereas female Asian elephants, Elephas maximus, do not have tusks) which can grow to 3 m (10 ft) and typically weigh about 62,000,000 grains