The distance between A and B is 380 kilometers. A passenger car and a truck leave from A and B at the same time. The original plan is that the passenger car travels 36 kilometers per hour, and the truck travels 40 kilometers per hour. But the passenger car changed its speed and drove out at the same speed as the truck. How many kilometers did the truck travel less than planned when we met?
甲乙两地相距380千米，客车和货车分别从甲乙两地同时相向开出．原计划客车每小时行36千米，货车每小时行40千米．但出发时客车改变了速度与货车同速度开出．求相遇时货车比原计划少行了多少千米？
<gadget id="calculator">36 + 40</gadget>
<output>76</output>

<gadget id="calculator">380 / 76</gadget>
<output>5</output>

<gadget id="calculator">40 * 2</gadget>
<output>80</output>

<gadget id="calculator">380 / 80</gadget>
<output>19/4 = around 4.75</output>

<gadget id="calculator">5 - (19/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">40 * (1/4)</gadget>
<output>10</output>

<result>10</result>