Uncle Li planted 18 poplar trees, and the number of willow trees planted is 6 times less than that of poplar trees, 7. How many willow trees did Uncle Li plant?
李叔叔栽了18棵杨树，栽的柳树的棵数是杨树的6倍少7棵，李叔叔栽了多少棵柳树？
<gadget id="calculator">18 * 6</gadget>
<output>108</output>

<gadget id="calculator">108 - 7</gadget>
<output>101</output>

<result>101</result>