Use 300 kg of rice to mill rice, and grind out 90 kg of bran. What is the yield rate of rice
用300千克的水稻碾米，碾出糠皮90千克．水稻的出米率是多少
<gadget id="calculator">300 - 90</gadget>
<output>210</output>

<gadget id="calculator">210 / 300</gadget>
<output>7/10 = around 0.7</output>

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

<gadget id="calculator">(7/10) * 1</gadget>
<output>7/10 = around 0.7</output>

<result>7/10 = around 0.7</result>