What is the sum of all the natural numbers within 100 that have a remainder of 1 when divided by 5?
100以内所有被5除余1的自然数的和是多少．
<gadget id="calculator">1 + 96</gadget>
<output>97</output>

<gadget id="calculator">96 - 1</gadget>
<output>95</output>

<gadget id="calculator">95 / 5</gadget>
<output>19</output>

<gadget id="calculator">19 + 1</gadget>
<output>20</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">97 * 10</gadget>
<output>970</output>

<result>970</result>