What is the formula for adding (2/15)*3?
把(2/15)*3改写成加法算式是多少．
<gadget id="calculator">2 / 15</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">(2/15) + (2/15) + (2/15)</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>