“en”>
“UTF-8”>
“viewport” content=
“width=device-width, initial-scale=1.0”
>
Spark Calculator
“calculator”>
“text” id=
“display”
readonly>
“buttons”>
“clear” onclick=
“clearDisplay()”
>C
“operator” onclick=
“appendOperator('/')”
>/
“operator” onclick=
“appendOperator('*')”
>×
“operator” onclick=
“deleteLast()”
>⌫
“appendNumber('7')”>7
“appendNumber('8')”>8
“appendNumber('9')”>9
“operator” onclick=
“appendOperator('-')”
>-
“appendNumber('4')”>4
“appendNumber('5')”>5
“appendNumber('6')”>6
“operator” onclick=
“appendOperator('+')”
>+
“appendNumber('1')”>1
“appendNumber('2')”>2
“appendNumber('3')”>3
“equals” onclick=
“calculateResult()”
>=
“appendNumber('0')” style=
“grid-column: span 2; width: 100%”
>0
“appendNumber('.')”>.