Final answer:
To estimate the product of 27.64 and 3, round both numbers to the nearest whole number, then multiply them together.
Step-by-step explanation:
To estimate the product of 27.64 and 3, you can round both numbers to the nearest whole number. So, 27.64 is approximately 28 and 3 is still 3. Then, multiply 28 by 3 to get an estimated product of 84.