Lol, I just took a look at this "Tariff Adjustment Calculator"...

("Consider an environment in which the U.S. levies a tariff of rate τ_i on country i and ∆τ_i reflects the change in the tariff rate. Let ε<0 represent the elasticity of imports with respect to import prices, let φ>0 represent the passthrough from tariffs to import prices, let m_i>0 represent total imports from country i, and let x_i>0 represent total exports. Then the decrease in imports due to a change in tariffs equals ∆τ_i*ε*φ*m_i<0. Assuming that offsetting exchange rate and general equilibrium effects are small enough to be ignored, the reciprocal tariff that results in a bilateral trade balance of zero satisfies:")

This doesn't define "elasticity" or "passthrough". And "assumptions about exchange rate equilibrium" leaves a lot to the imagination, especially if it can be ignored. But, the formula actually looks fairly basic;

{Total imports and costs/Total exports and costs} = Zero Difference

If the sum isn't zero, then an adjustment is necessary.

I'm sure the actual figures are much easier to understand lol;

(1 for you / 1 for me) = smile

Big Picture;
Bean counters always love complicated math.
For example: Calculating gas prices to the tenth of a cent...

International trade rules could certainly be simplified...
Trump knows that.