product of two multiline textboxes and display it also to another multiline textbox-CodePudding

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product of two multiline textboxes and display it also to another multiline textbox

Time：11-27

I want to know how to perform calculations such as multiplication of two multiline textboxes and the product of it will also display in a multiline textbox. Please see the design below

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Tags：

visual-studio

textbox

multiplication

multiline

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