You have to pay 6.6 yuan to buy 1500 grams of soft white sugar, so how much will you pay for 2.5 kilograms of soft white sugar? (Solve with ratio)
买1500克绵白糖要付6.6元，那么买2.5千克绵白糖，要付多少元？(用比例解)
<gadget id="calculator">6.6 / 1_500</gadget>
<output>0.0044</output>

<gadget id="calculator">2.5 * 1_000</gadget>
<output>2_500</output>

<gadget id="calculator">1 / 2_500</gadget>
<output>1/2_500 = around 0.0004</output>

<gadget id="calculator">0.0044 / (1/2_500)</gadget>
<output>11</output>

<result>11</result>