```
fun equalsClick(view: View) {
        val sec0perandText: String = resultTextView.text.toString()
        var sec0perand: Double = 0.0.roundToInt()

        if (!TextUtils.isEmpty(sec0perandText)) {
            sec0perand = sec0perandText.toDouble()

        }

        when (operation) {
            "+" -> resultTextView.text = (operand + sec0perand).toString()
            "-" -> resultTextView.text = (operand - sec0perand).toString()
            "*" -> resultTextView.text = (operand * sec0perand).toString()
            "/" -> resultTextView.text = (operand / sec0perand).toString()
        }

    }

```

Getting output in double is not an option because it gives Integers .0 in the end. I tried adding `.roundToInt()` which didn't work, when compiled it gives following error: `Type mismatch: inferred type is Int but Double was expected`.