There are three circles A, B, and C. It is known that the diameter of circle A is 8 cm. The radius of circle B is (1/2) the radius of circle A and (2/3) the radius of circle C. The radius of circle C is How many centimeters is it?
有A、B、C三个圆，已知A圆的直径是8厘米，B圆的半径是A圆半径的(1/2)又是C圆半径的(2/3)，C圆的半径是多少厘米？
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(1/2) / (2/3)</gadget>
<output>3/4 = around 0.75</output>

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

<result>3</result>