An engineering team rushed to repair a 17.4-kilometer-long highway. It was originally planned to be completed in 12 days, but it was completed in only 8 days. How much more kilometers was repaired per day than the original plan?
某工程队抢修一条长17.4千米的公路，原计划12天完成，结果只用8天就完成了，平均每天比原计划多修多少千米？
<gadget id="calculator">12 / 8</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">17.4 * (3/2)</gadget>
<output>26.1</output>

<gadget id="calculator">26.1 - 17.4</gadget>
<output>8.7</output>

<result>8.7</result>