Zhang Hua and Wang Rong started from the east and west at the same time and walked towards each other. After 1 hour and 15 minutes, Zhang Hua walked 0.75 kilometers more than half of the distance between the east and west villages. At this time, he met Wang Rong. 3.7 kilometers per hour, find Zhang Hua's speed.
张华和王荣分别从东西两地同时出发相向步行，1小时15分后，张华走了东西两村降距离的一半多0.75千米，此时与王荣相遇，王荣的速度是每小时3.7千米，求张华的速度．
<gadget id="calculator">0.75 * 2</gadget>
<output>1.5</output>

<gadget id="calculator">1.5 / 1.25</gadget>
<output>1.2</output>

<gadget id="calculator">3.7 + 1.2</gadget>
<output>4.9</output>

<result>4.9</result>