Cars A and B start from AB, which is 440 kilometers apart, and drive towards each other. The speed of car A is 1.2 times the speed of car B. After 4 hours, the two cars meet. What is the speed of car B? (solution by equation)
甲乙两车同时从相距440千米的AB两地出发，相向而行，甲车的速度是乙车速度的1.2倍，4小时后两车相遇．求乙车的速度是多少？(用方程解)
<gadget id="calculator">4 * 1.2</gadget>
<output>4.8</output>

<gadget id="calculator">4 + 4.8</gadget>
<output>8.8</output>

<gadget id="calculator">440 / 8.8</gadget>
<output>50</output>

<result>50</result>