Dissolve 50 grams of salt in 150 grams of water, what is the mass of salt in the salt water
把50克盐溶150克水中，盐占盐水质量的多少
<gadget id="calculator">50 + 150</gadget>
<output>200</output>

<gadget id="calculator">50 / 200</gadget>
<output>1/4 = around 0.25</output>

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