If a car drives from place A to place B, if it travels 35 kilometers per hour and arrives in 9 hours, if it is said to arrive within 7 hours, how many kilometers should the car travel at least per hour?
一辆汽车从甲地开往乙地，如果每小时行35千米，9小时到达，如果说要在7小时之内到达，汽车每小时至少要行多少千米．
<gadget id="calculator">9 / 7</gadget>
<output>9/7 = around 1.285714</output>

<gadget id="calculator">35 * (9/7)</gadget>
<output>45</output>

<result>45</result>