Probe: f = 32.0
Probe: c = 0.0
Probe: f = ?
Probe: c = ?

Probe: f = 212.0
Probe: c = 100.0
Probe: f = ?
Probe: c = ?

Probe: c = 0.0
Probe: f = 32.0
Probe: c = ?
Probe: f = ?

Probe: c = 100.0
Probe: f = 212.0
Probe: c = ?
Probe: f = ?

0.0 Celsius -> 32.0 Fahrenheits
100.0 Celsius -> 212.0 Fahrenheits
32.0 Fahrenheits -> 0.0 Celsius
212.0 Fahrenheits -> 100.0 Celsius

a = ?, b = ?, c = ? =>   ? *   ? =   ?
a = 2, b = ?, c = ? => 2.0 *   ? =   ?
a = ?, b = 3, c = ? =>   ? * 3.0 =   ?
a = ?, b = ?, c = 6 =>   ? *   ? = 6.0
a = 2, b = 3, c = ? => 2.0 * 3.0 = 6.0
a = 2, b = ?, c = 6 => 2.0 * 3.0 = 6.0
a = ?, b = 3, c = 6 => 2.0 * 3.0 = 6.0
a = 2, b = 3, c = 6 => 2.0 * 3.0 = 6.0

a = 0, b = ?, c = ? => 0.0 *   ? = 0.0
a = ?, b = 0, c = ? =>   ? * 0.0 = 0.0
a = ?, b = ?, c = 0 =>   ? *   ? = 0.0
a = 0, b = 7, c = ? => 0.0 * 7.0 = 0.0
a = 7, b = 0, c = ? => 7.0 * 0.0 = 0.0
a = 0, b = 0, c = ? => 0.0 * 0.0 = 0.0
a = 0, b = ?, c = 0 => 0.0 *   ? = 0.0
a = ?, b = 0, c = 0 =>   ? * 0.0 = 0.0
a = 0, b = 7, c = 0 => 0.0 * 7.0 = 0.0
a = 7, b = 0, c = 0 => 7.0 * 0.0 = 0.0
a = 0, b = 0, c = 0 => 0.0 * 0.0 = 0.0

a = 3, b = 4 => c = 5.0
a = 3, c = 5 => b = 4.0
b = 4, c = 5 => a = 3.0