Divide 2 tons of cargo into 7 parts, how many tons does 3 parts weigh?
把2吨货物平均分成7份，其中3份重多少吨
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">2 * (3/7)</gadget>
<output>6/7 = around 0.857143</output>

<result>6/7 = around 0.857143</result>