According to the measurement, the water in the body of an adult accounts for 2/5 of the body weight, and the water in the body of Xiaoming's father is 30 kilograms. How many kilograms does Xiaoming's father weigh?
根据测定，成人体内的水分占体重的(2/5)，小明爸爸体内的水分是30千克，小明爸爸的体重是多少千克？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">30 / (2/5)</gadget>
<output>75</output>

<result>75</result>