Xiaoqiang collected 180 used batteries. The used batteries collected by Xiaoming belonged to Xiaoqiang (5/6). The used batteries collected by Xiaogang belonged to Xiaoqiang (4/5). How many used batteries did Xiaoming collect?
小强收集废旧电池180节，小明收集的废旧电池是小强的(5/6)，小刚收集的废旧电池是小强的(4/5)，小明收集废旧电池多少节？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">180 * (5/6)</gadget>
<output>150</output>

<result>150</result>