Xiaoming and Xiaohong live in the same community. Xiaoming’s family used 8 tons of water last month and paid a water fee of 28 yuan; Xiaohong’s family paid a water fee of 35 yuan last month. How many tons of water did they use? (Solve with ratio)
小明和小红住在同一个小区，小明家上个月用了8吨水，交水费28元；小红家上月交水费35元，用了多少吨水？(用比例解)
<gadget id="calculator">28 / 8</gadget>
<output>7/2 = around 3.5</output>

<gadget id="calculator">35 / (7/2)</gadget>
<output>10</output>

<result>10</result>