Xiao Ming grinds 600kg of rice at home to produce 420kg of rice. What is the yield rate of his rice?
小明家用600kg稻谷碾出420kg大米，他家稻谷的出米率是多少．
<gadget id="calculator">420 / 600</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>