Put 20 grams of sugar into boiled water to make sugar water. The concentration of this sugar water is 10%. How many grams of boiled water are needed?
将20克糖放入白开水中制成糖水，这种糖水浓度为10%，需白开水多少克？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">20 / (1/10)</gadget>
<output>200</output>

<gadget id="calculator">200 - 20</gadget>
<output>180</output>

<result>180</result>