<!DOCTYPE HTML>
<head>
<meta charset = "utf8">
<title> Calculate two numbers </title>
</head>
<body>
<form action="script.php" method = "post">
<input type = "number" name ="firstName">
+
<input type = "number" name="secondName">
<br>
<input type="submit"/>
</body>
PCFET0NUWVBFIEhUTUw+CjxoZWFkPgoJPG1ldGEgY2hhcnNldCA9ICJ1dGY4Ij4KCTx0aXRsZT4gQ2FsY3VsYXRlIHR3byBudW1iZXJzIDwvdGl0bGU+CjwvaGVhZD4KPGJvZHk+Cgk8Zm9ybSBhY3Rpb249InNjcmlwdC5waHAiIG1ldGhvZCA9ICJwb3N0Ij4KCTxpbnB1dCB0eXBlID0gIm51bWJlciIgbmFtZSA9ImZpcnN0TmFtZSI+CgkrCgk8aW5wdXQgdHlwZSA9ICJudW1iZXIiIG5hbWU9InNlY29uZE5hbWUiPgoJPGJyPgoJPGlucHV0IHR5cGU9InN1Ym1pdCIvPgo8L2JvZHk+