Divide a cake into 7 pieces on average, and each piece is the size of the cake.
把一个蛋糕平均分成7块，每块是这个蛋糕的多少．
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<result>1/7 = around 0.142857</result>