The tallest animal in the world is the giraffe. An elephant is 3 meters tall. A giraffe is 2/3 taller than an elephant. How many meters tall is this giraffe?
世界上最高的动物是长颈鹿．大象高3米，一只长颈鹿比大象高(2/3)，这只长颈鹿高多少米？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 + (2/3)</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">3 * (5/3)</gadget>
<output>5</output>

<result>5</result>