Can be calculated according to the meaning of the question.

100÷ 18.5

=5.405405 ......

≈5 (Ben)

So you can buy five copies.

Extended data:

In division, if the dividend is divided by the divisor, the quotient obtained is a natural number without remainder, that is, the dividend is a multiple of the dividend, and the divisor and quotient are factors of the dividend.

When calculating the greatest common factor or the least common multiple, the factor needs to be a prime factor. The former is the product of the prime factor on the left, excluding the final factor at the bottom; The latter needs to be multiplied by the final factor.