Equation Driven Variables

I can’t believe how equation driven variables aren’t in figma! 

Ex. establishing a rem size (font size)

then Driving type scales and line height based on that rem unit. 
You can literally do this in css html 

 

--font-ratio: 1.333;

--font-size: 1.2rem;

--font-size-1: calc(var(--font-size) * var(--font-ratio));

--font-size-2: calc(var(--font-size-1) * var(--font-ratio));