The capacity of a bottle of milk is 2 liters. I drink 200 ml every day for 8 days. How much milk is left in this bottle?
一瓶牛奶的容量是2升，明明每天喝200毫升，喝了8天，这瓶牛奶还剩多少？
<gadget id="calculator">8 / 1_000</gadget>
<output>1/125 = around 0.008</output>

<gadget id="calculator">200 * (1/125)</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">2 - (8/5)</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>