When 60 grams of brine with a salt content of 30% is evaporated into brine with a saline content of 40%, what is the weight of the brine in grams?
当含盐为30%的60克盐水蒸发为含盐40%的盐水时，盐水重量是多少克．
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/10) / (2/5)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">60 * (3/4)</gadget>
<output>45</output>

<result>45</result>