Answer:
(19*13) * 1/21
Explanation:
Division is the same as multiplying by the reciprocal. When working with fractions, this is the easiest way to divide.
(19*13)/21
can also be written as:
(19*13) * 1/21
Whether you divide by 21 or multiply by the reciprocal of the number (1/21), the result will be the same.