87×64=
The multiplication of fractions 87 and 64 requires the direct operation of multiplying numerators with numerators and denominators with denominators.
- Multiply the numerators: 7×4=28
- Multiply the denominators: 8×6=48
- Form the resulting fraction: 4828
Now, we need to simplify 4828. Find the greatest common divisor (GCD) of 28 and 48, which is 4.
- Divide both numerator and denominator by their GCD: 48÷428÷4=127
Therefore, the solution to the problem is 127.
Thus, the correct answer is 127, which corresponds to choice 3.