A certain factory sends a car to pick up the engineer on time at 7:00 every morning. One day, the car failed to reach the chief engineer’s house at 7:10 due to a breakdown on the road, so the chief engineer walked out of the house and walked for a while. He met the car that came to pick him up. After he got in the car, the car immediately turned around and continued. After entering the gate of the unit, he found that he was 20 minutes later than usual. It is known that the speed of the car is 6 times the walking speed of the engineer. How much time is the failure delay?
某工厂每天早晨7：00都派小汽车按时接工程师上班，有一天，汽车在路上因故障原因导致7：10时还未到达总工程师家，于是总工程师步行出了家门，走了一段时间后遇到了前来接他的汽车，他上车后汽车立即掉头继续前进，进入单位大门后，他发现比平时迟到20分钟，已知汽车的速度是工程师步行速度的6倍，则汽车在路上因故障耽误的时间为多少？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">10 * (3/2)</gadget>
<output>15</output>

<gadget id="calculator">(1/3) * 15</gadget>
<output>5</output>

<gadget id="calculator">20 + 5</gadget>
<output>25</output>

<result>25</result>