The blood in the human body accounts for about 1/13 of the body weight. Xiaohua's weight is 52 kg. How much does the blood in his body weigh?
人体中的血液约占体重的(1/13)，小华的体重是52千克，他身体中的血液大约重多少千克？
<gadget id="calculator">1 / 13</gadget>
<output>1/13 = around 0.076923</output>

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

<result>4</result>