2.1/2•2

To calculate \( \frac{2.1}{2} \times 2 \):

1. First, divide \( 2.1 \) by \( 2 \): \[ \frac{2.1}{2} = 1.05 \]

2. Then, multiply the result by \( 2 \): \[ 1.05 \times 2 = 2.1 \]

So, \( \frac{2.1}{2} \times 2 = 2.1 \).