Zhang Ming has a number of pictures, 7 are counted and 4 are left, 5 are counted and 3 are missing, and 3 is just right. How many pictures does Zhang Ming have at least?
张明有若干张画片，7张一数还余4张，5张一数又少3张，3张一数正好．张明至少有画片多少张？
<gadget id="calculator">3 * 5 * 7</gadget>
<output>105</output>

<gadget id="calculator">105 - 3</gadget>
<output>102</output>

<result>102</result>