Blood accounts for 1/13 of a person's body weight. The blood in Xiaoming's body is about 4 kilograms. How many kilograms does he weigh?
一个人血液占体重的(1/13)．小明体内血液约4千克，他的体重约多少千克？
<gadget id="calculator">1 / 13</gadget>
<output>1/13 = around 0.076923</output>

<gadget id="calculator">4 / (1/13)</gadget>
<output>52</output>

<result>52</result>