The weight of blood in the human body accounts for about 1/13 of the body weight. Xiao Ming's weight is 52 kilograms, how many kilograms does the blood in his body weigh?
人体中血液重量约占人体重量的(1/13)．小明的体重是52千克，他体内的血液约重多少千克．
<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>