Experimental Primary School subscribes to "Science and Technology News", middle grades order 150 copies, and senior grades order 30 copies 1.5 times less than middle grades. How many copies are ordered by middle and senior grades?
实验小学订购《科技报》，中年级订150份，高年级比中年级的1.5倍少30份，中、高年级共订购多少份？
<gadget id="calculator">150 * 1.5</gadget>
<output>225</output>

<gadget id="calculator">225 - 30</gadget>
<output>195</output>

<gadget id="calculator">150 + 195</gadget>
<output>345</output>

<result>345</result>