5 1 5
56××= 35 (person) or: 56×-2 = 35 (person)
4 2 4
The arithmetic 1 denominator 4 and 56 are divided to get 14, and then divided by denominator 2 to get 7. Molecules are multiplied, and 5×7=35.
Algorithm 2: Divide the denominators 4 and 56 to get 14, then multiply it by the numerator to get 14×5=70, and then divide it by 2,70 ÷ 2 = 35.