<aside> ✅ Hit the Copy button in the upper-right corner of this code block. The formula can then be pasted in a Formula property.

</aside>

toNumber(slice(format(prop("Tasks Done")), 0, 4))

Expanded

<aside> ✅ This expanded version of the formula is just for reference and learning.

</aside>

toNumber(
    slice(
        format(
            prop("Tasks Done")
            ), 
            0, 
            4
    )
)