Xiao Ming and Xiao Qiang go from A to B at the same time, and their speed ratio is 4:3. Xiao Ming travels 20 kilometers per hour, how many kilometers per hour does Xiao Qiang travel?
小明和小强同时从甲地到乙地，他们的速度比是4：3．小明每小时行20千米，小强每小时行多少千米？
<gadget id="calculator">20 * 3</gadget>
<output>60</output>

<gadget id="calculator">60 / 4</gadget>
<output>15</output>

<result>15</result>