Did you know that blood in the human body accounts for about 1/13 of the body weight. The weight of Xiaohong's father is 78 kilograms, and Xiaohong's weight is 1/3 of her father's weight. How many kilograms is Xiaohong's blood?
你知道吗，人体内血液约占体重的(1/13)．小红爸爸的体重是78千克，小红的体重是爸爸体重的(1/3)，小红的血液约有多少千克？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 13</gadget>
<output>1/13 = around 0.076923</output>

<gadget id="calculator">78 * (1/3) * (1/13)</gadget>
<output>2</output>

<result>2</result>