If 236 kilograms of water are evaporated from the brine containing 0.5% salt, it becomes brine containing 30% saline. How many kilograms is the original brine?
在含盐0.5%的盐水中蒸去了236千克水，就变成了含盐30%的盐水，问原来的盐水是多少千克？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">236 * (3/10)</gadget>
<output>354/5 = around 70.8</output>

<gadget id="calculator">0.5 / 100</gadget>
<output>0.005</output>

<gadget id="calculator">(3/10) - 0.005</gadget>
<output>0.295</output>

<gadget id="calculator">(354/5) / 0.295</gadget>
<output>240</output>

<result>240</result>