Multiply 4 by 2 3/7. Convert the product to be a mixed number.

To multiply 4 by 2 3/7, we start by converting the mixed number to an improper fraction.

2 3/7 can be written as (2*7+3)/7 = 17/7.

Now we multiply 4 by 17/7:

4 * 17/7 = (4*17)/7 = 68/7.

To convert the product to a mixed number, we divide the numerator (68) by the denominator (7):

68 รท 7 = 9 r 5.

Since the remainder is 5, the mixed number is 9 5/7.