`<!DOCTYPE html>
<html>
<head>
-<title>Hello World HTML</title>
+<title>Calculation</title>
</head>
<body>
<h1>The Height is: ${height} units</h1>
`<!DOCTYPE html>
<html>
<head>
-<title>Hello World HTML</title>
+<title>Calculation</title>
</head>
<body>
<h1>Error - Unable to Calculate</h1>
`<!DOCTYPE html>
<html>
<head>
-<title>Hello World HTML</title>
+<title>Calculation</title>
</head>
<body>
<h1>Error - Unable to Calculate Negative Radius</h1>
`<!DOCTYPE html>
<html>
<head>
-<title>Hello World HTML</title>
+<title>Calculation</title>
</head>
<body>
<h1>The radius is: ${radius} ${units}</h1>
`<!DOCTYPE html>
<html>
<head>
-<title>Hello World HTML</title>
+<title>Calculation</title>
</head>
<body>
<h1>Error - Unable to Calculate</h1>