When a number is divided by 5, the remainder is 4, when divided by 4, the remainder is 3, and when divided by 7, the remainder is 6. What is the smallest number?
一个数除以5余4，除以4余3，除以7余6，这个数最小是几？
<gadget id="calculator">5 * 4 * 7</gadget>
<output>140</output>

<gadget id="calculator">140 - 1</gadget>
<output>139</output>

<result>139</result>