Students participate in tree planting, plant 3 trees in each row and at least 2 trees, plant 5 trees in each row and at least 2 trees, plant 7 trees in each row and at least 2 trees, at least how many of these trees are there?
同学参加植树，每行栽3棵少2棵，每行栽5棵少2棵，每行栽7棵少2棵，这些树至少有多少棵？
<gadget id="calculator">3 * 5 * 7</gadget>
<output>105</output>

<gadget id="calculator">105 - 2</gadget>
<output>103</output>

<result>103</result>