The number of peach trees is less than that of pear trees (1/7), so how much more are the number of pear trees than peach trees?
桃树的棵数比梨树少(1/7)，那么梨树的棵数比桃树多多少．
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 - (1/7)</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">(1/7) / (6/7)</gadget>
<output>1/6 = around 0.166667</output>

<result>1/6 = around 0.166667</result>