The sum of five consecutive natural numbers is 515, what is the smallest of these five natural numbers?
五个连续自然数的和是515，这五个自然数中最小的是多少．
<gadget id="calculator">515 / 5</gadget>
<output>103</output>

<gadget id="calculator">103 - 1 - 1</gadget>
<output>101</output>

<result>101</result>