It is known that the medicine occupies (1/7) of the potion, so how much does the medicine take up in the water?
已知药占药水的(1/7)，那么药占水的多少．
<gadget id="calculator">7 - 1</gadget>
<output>6</output>

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

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