Father and son are running and exercising. The father’s steps are relatively large. He runs 5 steps, the son needs to run 9 steps, and the father is 10 meters behind the son. In order to catch up with the son, the father speeds up the movement. Run 3 steps, ask dad how many meters at least can catch up with his son?
爸爸和儿子跑步锻炼，爸爸的步子比较大，他跑5步的路程，儿子要跑9步，爸爸在儿子后面10米，为了追上儿子，爸爸加快动作，爸爸跑2步的时间，儿子能跑3步，问爸爸至少多少米才能追上儿子？
<gadget id="calculator">6 - 5</gadget>
<output>1</output>

<gadget id="calculator">10 / 1</gadget>
<output>10</output>

<gadget id="calculator">10 * 6</gadget>
<output>60</output>

<result>60</result>