In the rope skipping competition, Liu Hong jumped 150 times. Li Mingtiao's next number is Liu Hong's (4/5) and Zhang Hua's (6/7). How many times did Zhang Hua jump?
在跳绳比赛中，刘红跳了150下．李明跳的下数是刘红的(4/5)，是张华的(6/7)．张华跳了多少下？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">(4/5) / (6/7)</gadget>
<output>14/15 = around 0.933333</output>

<gadget id="calculator">150 * (14/15)</gadget>
<output>140</output>

<result>140</result>