The answer is b because youre multiplying 3 and 4 but the 4 stays in the same spot!
You can try finding numbers that are close to what you think you can use for exaple lets say we want to find the answer to 54x34 you could multiply 50x30 to get an estimated answer
1e+6 is the amount of cubic CM (or one million 1000000)
5,309 divided by 43 is equal to 123.4651162790698
(4 x 4) - (4/4)
= 16 - 1
= 15
