Two people, A and B, ride bicycles towards each other from two places. It takes 6 hours for A to complete the trip. The ratio of the distance traveled by the two when they meet is 3:2. At this time, A travels 18 kilometers longer than B. What is the speed of B in kilometers per hour?
甲、乙两人骑自行车分别从两地相向而行，甲行完全程要6小时，两人相遇时所行路程之比为3：2，这时甲比乙多行18千米．求乙的速度是每小时多少千米？
<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/5) - (2/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">18 / (1/5)</gadget>
<output>90</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">6 * (3/5)</gadget>
<output>18/5 = around 3.6</output>

<gadget id="calculator">(2/5) / (18/5)</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">90 * (1/9)</gadget>
<output>10</output>

<result>10</result>