The water in the adult body accounts for about (2/3) of the body weight, and the water in the child's body accounts for about (4/5) of the body weight. Xiaoming's weight is 45kg, and Xiaoming's weight is exactly that of his father's (3/5), how many kilograms of water is there in father's body?
成人体内的水分约占体重的(2/3)，儿童体内的水分约占体重的(4/5)．小明的体重是45kg，小明的体重正好是爸爸的(3/5)，爸爸的体内大约有多少千克水分？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">45 / (3/5)</gadget>
<output>75</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">75 * (2/3)</gadget>
<output>50</output>

<result>50</result>