The oil mill uses 500 kg of peanut kernels to extract 210 kg of oil. Find the oil yield of peanut kernels.
榨油厂用500千克花生仁榨油210千克．求花生仁的出油率．
<gadget id="calculator">210 / 500</gadget>
<output>21/50 = around 0.42</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(21/50) * 1</gadget>
<output>21/50 = around 0.42</output>

<result>21/50 = around 0.42</result>