Divide a 16.5-meter-long steel pipe into two sections at a ratio of 7:8, what is the length of the longer section in meters?
把16.5米长的钢管按7：8分成两段，较长的一段是多少米．
<gadget id="calculator">7 + 8</gadget>
<output>15</output>

<gadget id="calculator">8 / 15</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">16.5 * (8/15)</gadget>
<output>8.8</output>

<result>8.8</result>