Last year, a certain elementary school bought 56 computers at a cost of 224,000 yuan. This year, the school purchased another 45 computers at a cost of 157,500 yuan. How much cheaper is each computer purchased this year than last year?
去年某小学买了56台电脑，花费了22.4万元，今年该校又购买了45台电脑，花费了15.75万元，今年购买的电脑每台比去年便宜多少万元？
<gadget id="calculator">22.4 / 56</gadget>
<output>0.4</output>

<gadget id="calculator">15.75 / 45</gadget>
<output>0.35</output>

<gadget id="calculator">0.4 - 0.35</gadget>
<output>0.05</output>

<result>0.05</result>