Xiao Zhang and Xiao Wang have to process the same number of parts, using the old machine tool to process 20 parts per hour. Later, the factory replaced them with a new type of machine tool, which can process 60 parts per hour. The ratio of the number of parts completed by Xiao Zhang before and after changing the machine tool is 2:3, and the time ratio of Xiao Wang before and after changing the machine tool is 3:2. As a result, Xiao Wang completed the task in 18 minutes less than Xiao Zhang. How many parts did each of them complete?
小张和小王要加工同样多的零件，用旧机床每小时加工20个，后来工厂为他们改换了新型机床，每小时加工60个．小张改换机床前后所完成的零件数的比为2：3，小王改换机床前后的时间比为3：2．结果小王比小张少用18分钟完成任务．他们每人完成了多少个零件？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">180 * (3/4)</gadget>
<output>135</output>

<result>135</result>