Solve 13/4*21/4

$$1 \frac { 3 } { 4 } \cdot 2 \frac { 1 } { 4 }$$

Evaluate

$$\frac{63}{16}=3.9375$$

Solution Steps

Multiply 1 and 4 to get 4.

$$\frac{4+3}{4}\times \frac{2\times 4+1}{4}$$

Add 4 and 3 to get 7.

$$\frac{7}{4}\times \frac{2\times 4+1}{4}$$

Multiply 2 and 4 to get 8.

$$\frac{7}{4}\times \frac{8+1}{4}$$

Add 8 and 1 to get 9.

$$\frac{7}{4}\times \frac{9}{4}$$

Multiply \frac{7}{4} times \frac{9}{4} by multiplying numerator times numerator and denominator times denominator.

$$\frac{7\times 9}{4\times 4}$$

Do the multiplications in the fraction \frac{7\times 9}{4\times 4}.

$$\frac{63}{16}$$

Factor

$$\frac{3 ^ {2} \cdot 7}{2 ^ {4}} = 3\frac{15}{16} = 3.9375$$