Uncle Wang drove from place A to place B, and traveled 150km in the first 3 hours. At this speed, it will take 4 hours to travel from A to B. How far is A and B?
王叔叔开车从甲地到乙地，前3小时行了150km．照这样的速度，从甲地到乙地一共要用4小时，甲、乙两地相距多远？
<gadget id="calculator">150 / 3</gadget>
<output>50</output>

<gadget id="calculator">50 * 4</gadget>
<output>200</output>

<result>200</result>