A chicken is 4 kg, and a goose is heavier (1/2) than it, how many kg does the goose weigh?
一只鸡4千克，一只鹅比它重(1/2)，鹅重多少千克？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + (1/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">4 * (3/2)</gadget>
<output>6</output>

<result>6</result>