How many grains of rice is 100 feet?
100 feet is roughly 4,354 grains of rice laid end to end.
That's roughly
4,354grains of rice laid end to end
Assuming one grain of rice is about a quarter inch long (7 mm, if you insist).
Also equal to
The math
One grain of rice is about a quarter inch long, or 7 mm in metric. 100 feet is 30.5 m. Divide one by the other:
30.5 m ÷ 0.007 m ≈ 4,354 grains of rice
Yes, we did the math in metric. Someone had to.