fix: redundant units

src/components/input/NumericInputWithUnit.tsx

@@ -101,9 +101,6 @@ export default function NumericInputWithUnit(props: {
   };
 
   const handlePrefixChange = (newPrefix: string) => {
-    const oldPrefixValue = siPrefixes[prefix];
-    const newPrefixValue = siPrefixes[newPrefix];
-
     setPrefix(newPrefix);
   };
 
@@ -112,7 +109,7 @@ export default function NumericInputWithUnit(props: {
     const oldInputValue = inputValue;
     const oldUnit = unit;
     setUnit(newUnit);
-    setPrefix('');
+    setPrefix('Default prefix');
 
     const convertedValue = Qty(oldInputValue * siPrefixes[prefix], oldUnit).to(
       newUnit

src/pages/tools/number/generic-calc/data/ohmsLaw.ts

@@ -10,19 +10,19 @@ const ohmsLawCalc: GenericCalcType = {
     {
       name: 'V',
       title: 'Voltage',
-      unit: 'V',
+      unit: 'volt',
       default: 5
     },
     {
       name: 'I',
       title: 'Current',
-      unit: 'A',
+      unit: 'ampere',
       default: 1
     },
     {
       name: 'R',
       title: 'Resistance',
-      unit: 'Ω'
+      unit: 'ohm'
     }
   ]
 };

src/pages/tools/number/generic-calc/data/voltageDropInWire.ts

@@ -44,7 +44,7 @@ const voltageDropInWire: GenericCalcType = {
     {
       name: 'L',
       title: 'Length',
-      unit: 'm',
+      unit: 'meter',
       default: 1
     },
     {