a and b are two different non-zero natural numbers, if 2a=5b, then ((a)/(b))=what.
a和b是两个不同的非零自然数，如果2a=5b，那么((a)/(b))=多少．
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>