On a map with a scale of 1:10,000,000, the distance between the two places is measured to be 8 centimeters. Cars A and B drive towards each other at the same time and meet after 4 hours. It is known that the speed of car A is 90 kilometers per hour. , Find the speed of car B.
在比例尺是1：10,000,000的地图上，量得两地的距离是8厘米，甲、乙两车同时从两地相向开出，4小时后相遇，已知甲车的速度是每小时90千米，求乙车的速度是多少．
<gadget id="calculator">1 / 10_000_000</gadget>
<output>1/10_000_000 = around 0</output>

<gadget id="calculator">8 / (1/10_000_000) / 100_000 / 4</gadget>
<output>200</output>

<gadget id="calculator">200 - 90</gadget>
<output>110</output>

<result>110</result>