The distance between A and B is 147 kilometers. Xiaoming and Xiaohua started from the two places at the same time by bicycle. After 1.5 hours, they meet. It is known that the speed ratio of Xiaoming and Xiaohua is 4:3. When they meet, Xiaoming is more than Xiaohua. How many kilometers do you travel?
甲、乙两地相距147千米，小明，小华骑车同时从两地相向出发，经过1.5小时相遇，已知小明，小华的速度之比是4：3，相遇时小明比小华多行多少千米？
<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(4/7) - (3/7)</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">147 * (1/7)</gadget>
<output>21</output>

<result>21</result>