There is a cup of 500ml of 35% sugar water, and 200ml of water is added, what is the concentration of the sugar water now?
现有一杯500毫升浓度为35%的糖水，再加入200毫升水，现在糖水浓度是多少．
<gadget id="calculator">35 / 100</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">500 * (7/20)</gadget>
<output>175</output>

<gadget id="calculator">500 + 200</gadget>
<output>700</output>

<gadget id="calculator">175 / 700</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">(1/4) * 1</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>