WPF MVVM in xaml binding viewmodel in property and setting Converter

There is this demand is to pass viewmodel of several elements in the view, multibinding how to write, after a round of online search found that almost all nultibinding used mutual transfer between interface elements.

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But in fact this problem very pseudo

<Button.Content>
                                                    <MultiBinding Converter="{StaticResource getRangeString}">
                                                        <Binding Path="nowQuaryCondition.ageLower"></Binding>
                                                        <Binding Path="nowQuaryCondition.ageUpper"></Binding>
                                                    </MultiBinding>
                                                </Button.Content>

Like this can be, and just need to affirm the right DataContext in front xaml file can be called directly by the Path property to the property we need