The sugar content of a glass of sugar water is 20%. Xiaohua drinks half a glass of sugar water and then fills it up with water. What is the sugar content of the sugar water in the cup?
一杯糖水的含糖率为20%，小华喝了半杯糖水后再加满水，这时杯内糖水的含糖率是多少
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) / 1</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/5) * (1/2)</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>