What is the comprehensive formula based on 630-270=360, 180/2=90, 360/90=4.
根据630-270=360，180/2=90，360/90=4列成综合算式是多少．
<gadget id="calculator">630 - 270</gadget>
<output>360</output>

<gadget id="calculator">180 / 2</gadget>
<output>90</output>

<gadget id="calculator">360 / 90</gadget>
<output>4</output>

<result>4</result>