The whole class of 54 people went rowing, rented 11 boats in total, and each boat was full. It is known that the big boat is limited to 6 people, and the small boat is limited to 4 people. How many big boats have you rented?
全班54人去划船，共租了11条船，每条船都坐满了，已知大船限乘6人，小船限乘4人，大船租了多少只．
<gadget id="calculator">6 * 11</gadget>
<output>66</output>

<gadget id="calculator">66 - 54</gadget>
<output>12</output>

<gadget id="calculator">6 - 4</gadget>
<output>2</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">11 - 6</gadget>
<output>5</output>

<result>5</result>