A cup of 200 grams of sugar water contains 20 grams of sugar. If you add 50 grams of sugar to the cup, what is the sugar content?
一杯糖水200克，其中糖20克，如果再往杯中放入50克糖，此时含糖率为多少
<gadget id="calculator">20 + 50</gadget>
<output>70</output>

<gadget id="calculator">200 + 50</gadget>
<output>250</output>

<gadget id="calculator">70 / 250</gadget>
<output>7/25 = around 0.28</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(7/25) * 1</gadget>
<output>7/25 = around 0.28</output>

<result>7/25 = around 0.28</result>