A car travels 100 kilometers from place A to place B in the first 2 hours. At this speed, it takes another 6 hours to arrive at B, how far is A and B? (Use proportions to solve.)
一辆汽车从甲地开往乙地，前2小时行驶了100千米．照这样的速度，再行6小时到达乙地，甲、乙两地相距多远？(用比例解．)
<gadget id="calculator">100 / 2</gadget>
<output>50</output>

<gadget id="calculator">50 * 6</gadget>
<output>300</output>

<gadget id="calculator">50 * 2</gadget>
<output>100</output>

<gadget id="calculator">300 + 100</gadget>
<output>400</output>

<result>400</result>