How many square decimeters is 5 square decimeters more than (1/2) of 30 square decimeters?
比30平方分米的(1/2)多5平方分米是多少平方分米．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">30 * (1/2)</gadget>
<output>15</output>

<gadget id="calculator">15 + 5</gadget>
<output>20</output>

<result>20</result>