The blood content in the human body is about 1/13 of the body weight. Aunt Li weighs 52 kilograms. How many kilograms does her blood have?
人体内的血液含量约是体重的(1/13)，李阿姨的体重是52千克，她的血液约有多少千克？
<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>