From a rectangular piece of paper 10 decimeters long and 6 decimeters wide, how many circles with a radius of 1 decimeter can be cut at most.
长10分米、宽6分米的长方形纸片，最多能剪多少个半径为1分米的圆片．
<gadget id="calculator">1 * 2</gadget>
<output>2</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<result>15</result>